add simple debug console

aqt/main.py

@@ -528,6 +528,10 @@ upload, overwriting any changes either here or on AnkiWeb. Proceed?""")):
 
     def setupKeys(self):
         self.keyHandler = None
+        # debug shortcut
+        self.debugShortcut = QShortcut(QKeySequence("Ctrl+:"), self)
+        self.connect(
+            self.debugShortcut, SIGNAL("activated()"), self.onDebug)
 
     def keyPressEvent(self, evt):
         # do we have a delegate?
@@ -889,6 +893,29 @@ will be lost. Continue?"""))
         diag.connect(box, SIGNAL("accepted()"), onDelete)
         diag.exec_()
 
+    # Debugging
+    ######################################################################
+
+    def onDebug(self):
+        d = QDialog()
+        frm = aqt.forms.debug.Ui_Dialog()
+        frm.setupUi(d)
+        d.connect(frm.line, SIGNAL("returnPressed()"), lambda: self.onDebugRet(frm))
+        d.exec_()
+
+    def onDebugRet(self, frm):
+        import pprint
+        line = frm.line.text()
+        if not line:
+            return
+        def card():
+            return self.reviewer.card.__dict__
+        locals = dict(mw=self, card=card)
+        ret = eval(line, globals(), locals)
+        if not isinstance(ret, basestring):
+            ret = pprint.pformat(ret)
+        frm.log.appendPlainText(">>> %s\n%s\n" % (line, ret))
+
     # System specific code
     ##########################################################################
 

designer/debug.ui

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Dialog</class>
+ <widget class="QDialog" name="Dialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>643</width>
+    <height>580</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Debug Console</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout">
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QLabel" name="label">
+       <property name="text">
+        <string>Expression:</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QLineEdit" name="line"/>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QPlainTextEdit" name="log">
+     <property name="focusPolicy">
+      <enum>Qt::NoFocus</enum>
+     </property>
+     <property name="readOnly">
+      <bool>true</bool>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

designer/main.ui

@@ -99,7 +99,6 @@
      <addaction name="actionOpenPluginFolder"/>
      <addaction name="separator"/>
      <addaction name="menuStartup"/>
-     <addaction name="separator"/>
     </widget>
     <widget class="QMenu" name="menuMaintenance">
      <property name="title">